Clean up SessionStateDelegate in chrome

components/session_manager/core/session_manager.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/session_manager/core/session_manager.h"
 
 #include <algorithm>
 
 #include "base/logging.h"
 #include "build/build_config.h"
@@ skipping 44 matching lines @@
 }
 
 bool SessionManager::IsSessionStarted() const {
   return session_started_;
 }
 
 void SessionManager::SessionStarted() {
   session_started_ = true;
 }
 
+bool SessionManager::IsInSecondaryLoginScreen() const {
+  return session_state_ == session_manager::SessionState::LOGIN_SECONDARY;

[James Cook, 2017/01/06 23:52:43]

nit: I don't think session_manager:: is needed here or below

[xiyuan, 2017/01/07 00:07:32]

Right. Remove here the Line 70.

+}
+
+bool SessionManager::IsScreenLocked() const {
+  return session_state_ == session_manager::SessionState::LOCKED;
+}
+
+uint32_t SessionManager::GetMaximumNumberOfUserSessions() const {
+  // Limits the number of logged in users to 10 due to memory constraints.
+  return 10u;
+}
+
 void SessionManager::AddObserver(SessionManagerObserver* observer) {
   observers_.AddObserver(observer);
 }
 
 void SessionManager::RemoveObserver(SessionManagerObserver* observer) {
   observers_.RemoveObserver(observer);
 }
 
 void SessionManager::NotifyUserLoggedIn(const AccountId& user_account_id,
                                         const std::string& user_id_hash,
@@ skipping 15 matching lines @@
   DCHECK(std::find_if(sessions_.begin(), sessions_.end(),
                       [user_account_id](const Session& session) {
                         return session.user_account_id == user_account_id;
                       }) == sessions_.end());
 
   sessions_.push_back({next_id_++, user_account_id});
   NotifyUserLoggedIn(user_account_id, user_id_hash, browser_restart);
 }
 
 }  // namespace session_manager